stage-2: simplify exporting path

nixos/modules/system/boot/stage-2-init.sh

@@ -2,7 +2,7 @@
 
 systemConfig=@systemConfig@
 
-export HOME=/root
+export HOME=/root PATH="@path@"
 
 
 # Print a greeting.
@@ -11,21 +11,6 @@ echo -e "\e[1;32m<<< NixOS Stage 2 >>>\e[0m"
 echo
 
 
-# Set the PATH.
-setPath() {
-    local dirs="$1"
-    export PATH=/empty
-    for i in $dirs; do
-        PATH=$PATH:$i/bin
-        if test -e $i/sbin; then
-            PATH=$PATH:$i/sbin
-        fi
-    done
-}
-
-setPath "@path@"
-
-
 # Normally, stage 1 mounts the root filesystem read/writable.
 # However, in some environments, stage 2 is executed directly, and the
 # root is read-only.  So make it writable here.

nixos/modules/system/boot/stage-2.nix

@@ -23,11 +23,11 @@ let
     inherit (config.nix) readOnlyStore;
     inherit (config.networking) useHostResolvConf;
     inherit (config.system.build) earlyMountScript;
-    path =
-      [ pkgs.coreutils
-        pkgs.utillinux
-        pkgs.openresolv
-      ] ++ optional config.nix.readOnlyStore readonlyMountpoint;
+    path = lib.makeBinPath ([
+      pkgs.coreutils
+      pkgs.utillinux
+      pkgs.openresolv
+    ] ++ optional config.nix.readOnlyStore readonlyMountpoint);
     postBootCommands = pkgs.writeText "local-cmds"
       ''
         ${config.boot.postBootCommands}